Fix code checker errors

Author: dlmsr

db/services.php

@@ -13,6 +13,7 @@
 //
 // You should have received a copy of the GNU General Public License
 // along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
+
 /**
  * Services for the groups block.
  *

db/upgrade.php

@@ -13,6 +13,7 @@
 //
 // You should have received a copy of the GNU General Public License
 // along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
+
 /**
  * Upgrade for the groups block.
  *

lang/en/block_groups.php

@@ -13,6 +13,7 @@
 //
 // You should have received a copy of the GNU General Public License
 // along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
+
 /**
  * This file contains language strings used in the group block
  *

locallib.php

@@ -13,6 +13,7 @@
 //
 // You should have received a copy of the GNU General Public License
 // along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
+
 /**
  * blocks_groups internal functions
  *

tests/generator_test.php

@@ -13,6 +13,7 @@
 //
 // You should have received a copy of the GNU General Public License
 // along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
+
 /**
  * PHPUnit data generator tests
  * @package    block_groups